I posted recently about a slight ticking noise on an 84' Jetta 1.7l EN engine and thought it was from the valve lash out of wack. I checked and they were all within spec. I did notice however that when I turn the crankshaft by hand, there is a hissing sound throughout each compression stroke. Could that be a burnt valve, or a valve not sealing correctly? The engine was overheated about a year ago and the head was warped. Could it be that the valves don't seal just right b/c the seats are warped. Would it be best to get a new or rebuilt head, or would a valve job fix it? Can you even get new heads for the 1.7l EN anymore? Or is thi hissing sound normal?
Would it hurt the block/pistons in anyway if I would continue to run it like that as I am somewhat short on cash?
Thanks in advance, JJ